- © 2010 by the Seismological Society of America
New Zealand felt earthquake reports have been collected since the late 19th century. In March 2004, the GeoNet Project, operated by GNS Science, implemented an Internet-based questionnaire. The aim was to provide an objective and automatic assignment of Modified Mercalli (MM) earthquake shaking intensity and location based on answers to a set of standardized questions. Since the first year of implementation, the number of reports received has increased tenfold. Besides providing valuable information for emergency response agencies, the reports led to the enhancement of isoseismal models and better understanding of the regional effects of earthquakes in New Zealand.
The GeoNet Project, launched in 2001, is an integrated geological hazards monitoring and data collection system funded by the New Zealand Earthquake Commission and designed, built, and operated by GNS Science. GeoNet provides real-time monitoring of earthquake, volcano, land deformation, tsunami, and landslide hazards in New Zealand. The networks of instruments collect data that are freely available to users both in New Zealand and around the world via its Web site (http://www.geonet.org.nz).
History of Electronic Felt Earthquake Reporting
Felt earthquake reports are a valuable means of obtaining information on how people across New Zealand have experienced an earthquake. Reports have been collected in New Zealand since the late 19th century. Increasingly inexpensive technology and the growing public adoption of the Internet has fueled three phases of electronic felt report collection in the past ten years:
optical mark recognition (OMR) forms,
e-mail reports, and
Optical Mark Recognition (OMR) Forms
A machine-readable questionnaire, developed by G. Downes and D. Maunder in 2000, was an entirely revised and expanded set of questions based on Dowrick's (1996) version of the Modified Mercalli Intensity scale. The new form had not been widely implemented before it became clear that the growing use of the Internet by the general public suggested a more effective means of obtaining …